In his youth he can be satisfied by serving himself alone, but as he matures selfgratification is no longer as satisfying.
他年轻时,只要能服务自己就很满意了,但是成熟后,自我满足已不能让他满意了。
2
One does not host with the expectation of anything in return, and that conditions the circumstances of the hook-up - it seems less like an act of self-gratification than one of mutual generosity.